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QUESTION

# What is the valence electron configuration for calcium?

Calcium can be found in the 4th energy level (row) of , and in the 2nd group (column). The first two groups (columns) of the periodic table represent the 's' orbital group. This means that the for calcium must end with 4s^2. The 4th energy level (row), 's' orbital block, 2nd group (column).

The total electron configuration is:

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 or [Kr] 4s^2

The are found in the highest energy level of the electron configuration in the 's' and 'p' orbitals.

In the case of calcium this is 4s^2. This gives calcium an 's' orbital with a pair of electrons in its valence shell.

I hope this was helpful. SMARTERTEACHER